the answer is metro
Guildford hasn't got an Underground system, so no underground trains.
The usual name is a subway.
Subways
All trains are noisy. Underground trains sound noisier because the tunnel reflects the noise back.
it means a secret passage
Yes, tourists and residents can film trains in the London Underground.
No. Luxor, Egypt has only above-ground trains.
It was called Clockwork Orange after a film of the same name. The trains are smaller than normal underground trains, and were coloured orange as their corporate colour for some time until the early 2000s.
Depends what you mean: Firstly, what are 'normal' trains and why are underground trains not 'normal'? Can non-LU trains run on the tube network? A: No, they will not fit in the tunnels Does LU have an intergrated transport network with non-LU trains? Yes, sometimes on adjacent platforms
The tube.The name comes from the circular tube like tunnels that the trains ride in.
The Maginot Line .
Electric traction motors in each car via a "3rd rail" feeding electricity.